Expansion of a copper mine
Everything from one source
All WEG products are installed by experienced technicians on site ...
The Zest WEG Group has successfully implemented at Lubambe Copper major contract within the mining consortium "Konkola North" in Zambia. For the expansion of infrastructure and equipment of wet copper mine, the group supplied the electrical equipment and all measuring systems worth more than 200 million rand (about 17 million euros).
In mining machinery and equipment must meet the highest requirements. The external conditions, often remote location of development areas and the extreme performance requirements require motors and drives of the highest quality and reliability. The high energy required for mining applications means that already have small savings on a machine large impact on the overall energy balance. Potentiate this effect can be when, as in the case of "Konkola North," a broad-based manufacturers such as PATH provides a total package of perfectly matched and tuned to the needs of the customer equipment.
Integrated team
Due to the diversity and complexity of the tasks of the drive technology specialist put together specifically a small, integrated team of experts to provide technical support. The aim was to minimize risks for customers. The application-specific development for the various product groups was assigned within the group. This direct coordination between the different development teams made unnecessary repairs on the machines on site. Was thanks to technical expertise, broad product portfolio and previous experience from numerous reference projects worldwide, the manufacturer in the event of Konkola North ¿¿virtually offer everything from one source.
Especially for large projects which benefit plant operators when a supplier takes over the financial and overall technical responsibility for the whole project. Therefore, the strategy of the drive technology company aims to work more cross-functionally and to further integrate the companies of the Zest WEG group of companies whose products and services complement each other.
Efficient motor-inverter combination
While at mills in the past exclusively slip ring motors were used, switching to large squirrel cage motors and inverters takes place lately. For the project "Konkola North," the company from Kerpen-Türnich for the semi-autogenous mill (SAG, Semi-Autogenous Grinding Mill) is a 6-pole squirrel cage induction motor in B3 with a capacity of 4.4 MW and a voltage of 3, MVW01 3 kV and a frequency related to a frequency transformer provided with three windings. In the low-voltage motors, the latest generation of IE2-W22-electric motors manufacturer for use, equal in terms of efficiency and the specifications of IEC60034-30 comes. The fan drive is now based on four special 10-pin slip ring motors in B3 with an output of 950 kW and a voltage of 11 kV.
The frequency MVW01 plays a particularly important role in this case. It provides a high frequency with an efficiency of more than 90%. And that's just for applications with high kW values where potentially large losses can occur, a crucial factor. The drive systems are modular, which simplifies operation and maintenance and allows for customization of the software. Another advantage of the chosen solution is that the combination of inverter and transformer with three windings reduces the harmonics to a level that meets the specifications of the IEEE519.
Ball mill for a six-pole wound rotor machine in B3 was delivered with a power of 6.2 MW and a voltage of 11 kV. All auxiliary equipment as well as the operating and control around the ball mill, such as the circuit breaker on the inverter and all connected cables come from WAY - an extraordinary task for the Team. In addition, the company has developed a so-called "frozen-charge protection," especially for mills. This torque and angle of rotation of the mill will be monitored and recognized as sticking of the charge early. In case of failure, an alarm warns the operator in time before any damage can occur. In addition, PATH provided all low voltage motors for the project, both for the mining sector as well as for the processing plant - a total of more than 500 pieces. Shaw Controls, also a member of the group participated with 15 MCCs in the project.
Electrical infrastructure
Enl Electrical, another company of the group, was responsible for the installation of the entire electrical infrastructure from the main switchboard to the consumer distribution stations and the main engine controls as well as for the delivery of all electrical equipment including cables, racks and measuring cables. The electrical and metrological network also included fiber-optic communication lines of the MCCs to the motors of the plant. This work package also included a 11-kV transmission line network in and around the plant around, all lights, small motors, among other things for six scissor, the electrical wiring of all ventilation shafts and five individual distribution stations, and the supply of all electrical wiring and equipment for the underground part of the project.
Success through experience
An important factor for the success of the joint project "Konkola North" was the extensive previous experience of this kind Zest WEG Group because the Group companies of the group projects have already implemented many successful projects together in the past. In the case of "Konkola North" secured especially the integrated team structure with a mix of managers of different departments and competent technicians on site to the scheduled completion of the project. With the fulfillment of the comprehensive contract in Zambia, the company has once again demonstrated that it is one of the leading providers of solutions for power distribution, automation and control worldwide. The company is able to offer its high quality products and intelligent package to optimize the energy efficiency of machinery and equipment. And these qualities can be transmitted both to other industries as well as to other places as a solution provider. So WEG has also in Germany and Europe, the skills, the resources and the experience to implement such large projects. jg
Rainbow cooperation
The Konkola North copper project is a 50:50 joint venture between African Rainbow Minerals (ARM) and the Brazilian mining company Vale. The mining area is located near the city Chililabombwe near the border with the Democratic Republic of Congo and north of the Konkola Copper Mine. The mine is designed for a peak production of 2.5 million tonnes of ore and waste rock 0.6 million per year
No comments:
Post a Comment